David Keirsey Books

Please understand me

By David Keirsey

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Please understand me

By David Keirsey

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After presenting a brief rundown of 20th-century psychology movements, Keirsey and Bates encourage you to take the 70-question "Keirsey Temperament Sorter," a sort of mini-Myers-Briggs test that pl...

Portraits of Temperament

By David Keirsey

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Por favor comprendeme

By David Keirsey, Marilyn Bates

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Versteh Mich Bitte

By David W. Keirsey

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Please Understand Me

By David Keirsey, Marilyn Bates

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Please understand me II

By David Keirsey

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The Artisan Series Vol. 2

By David Keirsey

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The Artisan Series Vol. 3

By David Keirsey

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How to Convert ISBN-10 to ISBN-13 (and Vice Versa): A Complete Guide

If you’re in the world of books—whether as a publisher, librarian, bookseller, or avid collector—you’ve likely come across the terms ISBN-10 and ISBN-13. Understanding these formats and knowing how to convert between them is essential for maintaining consistency and compatibility in book records. In this post, we’ll cover everything you need to know about ISBN conversions, step by step.

What is an EAN and How Does it Relate to an ISBN?

If you’ve ever purchased a product online or in a store, you’ve likely come across a barcode. Behind these barcodes lies a standardized system that makes modern commerce possible. Two key codes often encountered are the EAN (European Article Number) and ISBN (International Standard Book Number). But what are they, how are they connected, and why are they so crucial? Let’s explore.